Deutzia 'Chardonnay Pearls' looks similar and has opposite leaves.

Yes! That looks correct. Thank you so much!

Hi there - We planted one of these spectacular specimens* in our newly renovated backyard last summer! We all love it and so do the neighborhood butterflies! *Sorbaria Sorbifolia Common Name: Ural False Spirea Zone: 2 to 8 Height and spread: 5 to 8 feet Sun: Full sun Water: Medium This shrub is not fussy. It thrives best in average to moist, rich, well-drained soil in full sun. May spread by suckers, especially in looser soils. Stays in check in clay soils. Prune in late winter to early spring (plants may be cut close to the ground to rejuvenate). This shrub has no serious insect or disease problems.

Never mind - I think I found it: Elaeagnus umbellata